Download The Squid

The Squid
Locomotion
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among the fastest invertebrates
on earth (40 km/h)
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can even jump 3m out of the
water
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naturally jet propelled
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The outside body is called the
MANTLE which fits like a hat over
the real body and organs of the
squid.
squid open mantle and suck
water in.
The water is let out in only one
place, the FUNNEL.
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FINLETS to act as rudders on the
outside.
Breathing/Respiration
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blood is next to the water with only
a thin wall, one cell thick
between water and blood in a
feathery structure called the
CTENIDIUM
Oxygen-rich water is continually
pushed past the ctenidia by
contraction of the MANTLE.
Eating
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predators.
Squid have eight shorter ARMS and two
TENTACLES
arms rip-apart prey
Tentacles catch prey (suckers on ends)
take bites with BEAK (fingernail-like material)
The meat is ripped apart even more by the
RADULA, a conveyor belt of tiny teeth
Food path ESOPHAGUS into STOMACH into
CECUM where it is absorbed into blood
Reproduction
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2-3 yr life span
Males has a single TESTIS
He hands it off sperm “bundle” like a football to
the female using his long tentacles.
The sperm is stuck to the inside wall of the
female's mantle so she can use it to fertilize her
eggs when she lays them.
male dies after mating
Females lay from 1000 to 5000 eggs in strings or
'fingers' stuck to the bottom of the ocean.
After laying her eggs, the female usually dies
Blood / circulation
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open circulatory system
Earth squid have three hearts. One
big SYSTEMIC HEART pumps blood
around the body and to the brain
while one BRANCHIAL HEART on
each gill helps push blood through
the little capillaries there.
Changing color
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Color cells, called CHROMATOPHORES,
in the squid's skin contract and expand to
produce different colors and patterns.
Squid can turn dark, squeeze ink out of
their INK SAC, then turn light or clear to
confuse a predator and escape.
ink is made out of melanin and mucous..